you are not authorized to perform that operation

I can't seem to get a good installation of Notes 8.5 client on a laptop. I get a pop up after configuring the Notes client for the first time saying "You are not authorized to perform that operation." I've unistalled/reinstalled to a new directory. I've made the user a local administrator. I can get to his mailbox with a browser, and all mail flow works (in and out). I've googled it till I can google no more. Not sure what else to try.
TIA!

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